[填空题]
A projectile is fired from ground level with an initial s3b prk7al k+.16rddq vpeed of 55bov-o)h;c9l,o xx8)i,yvsv r; ju m*il17a gh.6 m/s at an angle oj7l lh;ogb;* vy)c1vm i8xsuxh9 v ao-,io)r,f $41.2^{\circ}$ above the horizontal. (a) Determine the time necessary for the projectile to reach its maximum height. $s$ (b) Determine the maximum height reached by the projectile. $m$ (c) Determine the horizontal and vertical components of the velocity vector at the maximum height. horizontal: $m/s$ vertical: $m/s$ (d) Determine the horizontal and vertical components of the acceleration vector at the maximum height. horizontal: $m/s^2$ vertical: $m/s^2$
